Grinding, crushing, pulverizing, mixing, and separating machine



D. J. REES March 19, 1929.

GRINDING, CRUSHING, PULVERIZING, MIXING, AND SEPARATING MACHINE //VVE/VTOP Arm/m5) Filed Jan. 6, 1927 .vgmzz Jjzw.

wtzz' 4444) 16 54mm Patented Mar. 19, 1929.

DAVID JOHN REES, OF LONDON, ENGLAND.

GRINDING, CRUSHING, PULVERIZING, MIXING, AND SEPARATING MACHINE.

i Application filed January 6, 1927, Serial No. 159,402, and in GreatBritain January 20, 1926.

This invention relates to grinding, crushing, pulverizing, mixing andseparating machines and more particularly to that type in which a shaftrotates a carrier plate, spider or arms from which is suspended or towhich is attached one or more roll heads, pushers, balls or othersuitable heads which grind, crush or mix the materials against a ring ordie.

The invention has for its object to provide an improved construction ofmachine.

According to this invention, resilient means are interposed between thedriving member and the roll head or the like so that flexibility isobtained to control the centrifugal force or other pressures developedin the machine, said resilient means carrying or supporting the saidroll head or the like and giving same a positive directional drive.

The said resilient means preferably consists of one or more springs oflaminated or leaf type secured to the driving shaft of the machine andto which the roll head or the like is attached.

In order that the invention maybe fully understood, it will now bedescribed with reference to the accompanying drawings in which Figure 1is a sectional elevation of one form of grinding machine constructed inaccordance with this invention, and Figure 2 is a plan view taken on theline 22 of Figure 1.

a is the main driving shaft mounted in the bearing 6. On the upperextremity of the shaft a is a pinion c meshing with pinion d on thedriving shaft (2 e, e are roller hearings in the bearing 7) and is asuitable dust-proof packing.

Secured to the lower extremity of the shaft (1 is a spring carrier 9 forthe two roll shafts k, k which carry at their lower extremities the rollheads 1', j.

The carrier 9 consists of a casting formed with two parallel grooves inwhich are held two curved leaf springs Z, Z by means of inverted channelshaped members m, m and keys a, n. The rolls shafts h, h are mounted ontransverse shafts is carried by the two springs Z, Z. 0 is the usual diering suitably positioned above the pan 3 of the machine, and p is thescreen.

Depending from the carrier 9 is an arm or bracket 9 carrying a plough orstirrer 1".

The members m, m also prevent any torsional strain on the springs Z, Zwhen rotating at high speed, but instead of the members m, m, metalstraps may be provided over the said springs.

The dot-and-dash lines in Figure l indicatethe positions of the rollshaft and roll head when the shaft a is stationary.

With a grinding or like machine constructed according to this invention,a positive direct onal drive is ensured and the necessary flexibihty ispresent to govern, increase or retard centrifugal or other necessaryforces employed in the pulverizing or grinding of refractory materials.

Furthermore such flexibility will overcome r sk of breakage or collapsedue to excessive h gh speeds or danger from the entry of forelgnmaterials such as bolts or other metal articles that may find their wayinto the feed along with the material to be treated.

Vibration will be reduced, and undue shocks absorbed, thereby making forreduced wear and tear costs.

Suitable means for lubricating the bearings of the machine may beprovided.

The rise and fall of the roll head or the like over the surfaces of thedie ring caused by the flexing of the springs will impart a skiddingaction to the grinding mechanism with the result that a larger outputwill take place.

WVhat I claim is l. A centrifugal grinding machine, comprising agrindingchamber containing an annular die, a central shaft arranged above sa ddie, a carrier secured to said shaft, a pair of curved springs arrangedparallel to one another and supported upon said carrier, a roll shaftpivotally mounted on said springs and a roll head rotatably mounted atthe lower extremity of said shaft.

2. A centrifugal grinding machine, comprising a grinding chambercontainin an annular die, a central shaft arranged a ove sald die, acarrier secured to said shaft, a pair of curved springs arrangedparallel to one another and supported upon said carrier, means securedto said carrier and embracing said springs to prevent torsional strainthereof, a roll shaft pivotally mounted at both extremities of said pairof springs and a roll head rotatably mounted at the lower extremity ofeach shaft.

3. A centrifugal grinding machine comprising a grinding chambercontaining an annular die, a central shaft arran ed above said die, acarrier secured to saic shaft, :1

pair of curved springs arranged parallel to one another andsupported'upon said carrier, means secured to said carrier and embracingsaid springs to prevent torsional strain thereof, a transverse shaftmounted at the extremity of each pair of springs, a roll shaft dependingfrom each transverse shaft and a roll head rotatably mounted at thelower extremity of'each shaft.

4. A centrifugal grinding machine comprising a grinding chambercontaining an annular die, a central diving shaft arranged above saiddie, resilient means carried by said driving shaft, a roll'shaft'connected to said resilient means, a centrifugaily actuated roll carriedby said roll shaft and adapted to cooperate with said die, and saidresilient means giving said roll a positive directional drive Withoutinterfering with its freedom to rise and fall in a vertical plane. Y

5. A centrifugal grinding machine comprising a grinding chambercontaining an annular die, a central driving shaft arranged above saiddie ,resilient means carried by said driving shaft, a plurality of rollshafts connected to said resilient means, a centrifugally actuated rollcarried by each of said roll shafts and adapted to cooperate with saiddie, and said resilient means givsaid rolls a positive directional driveWithout interfering With its freedom to rise and fall in a verticalplane. 7

in testimony whereof he affixes his signature.

DAVID JOHN REES.

